/*
 * 计算长方体体积（3分）
 */

#include <stdio.h>

int main() {
	setbuf(stdout, NULL);

	const double a = 1.2, b = 4.3, c = 6.4;
	double volume = a * b * c;

	printf("volume=%.3f\n", volume);

	return 0;
}